Launch the Appstore on your iPhone.
Look for Avertinoo.
Click on the price from our application.
Click on "Buy" to confirm.
Enter your iTunes password.
Launch iTunes on your Mac / PC.
CLick on iTunes store in the left pane.
Look for Avertinoo via the search option.
(upper right corner from iTunes)
Click on Avertinoo to open the description.
Click on buy the app.
Enter your iTunes credentials and password.
Avertinoo starts to download.
Once downloaded, connect your iPhone, after a few seconds it will appear in the left pane.
Click on it to open the information and configuration page of your iPhone.
Down right click on synchronize to load Avertinoo on your iPhone.
Wait the end of the synchronization before disconnecting the iPhone.